Spray head and method of spraying



June 4, 1929. w. H. KLEIN SPRAYHEAD AND METHOD OF SPRAYING Filed May 6, 1924 zle is Patented June 4, 1929.

WILLIAM H. OF RICHARD CITY, TENNESSEE.

SPRAY HEAD AND METHOD or 'srRAYmG.

Application filed may 6,

My invention relates to sprayheads and more particularly to outlet nozzles from,

sprayheads.

A purpose of my invention is to provide an involute sprayhead having lateral discharge with an outwardly converging discharge nozzle. I

A further purpose is to have the converging. nozzle of circular section which may be, longitudinally, either conical or bell form.

Further purposes will appear in the specification and in the claims.

I have preferred to illustrate my .invention by two forms only, selecting forms that are practical, efficient, reliable and inexpensive, and which at the same time well illus trate the principles involved.

Figure 1 is a top plan view of an involute spilay head supplied with my invention.

1 taker? u on the line H of Figure 1 and illustrating slightly different forms, of any one of which Figure 1 may be considered as a plan view.

In the drawings similar numerals indicate like parts in all figures.

Describing in'illustration and not in limitation and referring to the drawings 1- The present invention relates more particularly to the form of discharge nozzle for spray heads of the general type disclosed and claimed in my application for rigid sp ay head, filed June 9, 1922, Serial No. 567,601.

The sprayhead 6 comprises intake 7, main cpm'partment 8 and tubular discharge nozz e 9.

The intake, enlargedand internally threaded at its inlet 10 to connect to water supply 11, preferably has its initial circular sec- P p tion gradually modified to a rectangular section at the point 12 where the water discharges into compartment 8. Desirably the sectional area along the intake throat progressively reduces toward the discharge end, providing thus gradual increase of water velocity through the intake and the, rectum gular section of the inlet atthe edge of the compartment gives an interiorly-flat stream there. The contour of the bod in section perpendicular to the axis of t e dischar' e-nozthe'arrows of Figure 1. ures 2, 3 and 4 are sectional elevatlons tion bringing a referably that of a flat spira or involute eneath and about inlet end 13 of the v 1924. Serial No. 711,327.

discharge nozzle. The outlet, is much smaller in cross sectionthan the supply and preferably smaller than the discharge end of the throat, to provide progressive reduction in cross section from the inlet to the discharge nozzle. The spiral or involute walls unite opposite walls of the intake, departing or offsetting from opposite vertical walls of, the rectangular intake gradually (tangentially) at one lateral wall and'abruptly at the opposite lateral wall.

-' The inlet of the discharge nozzle is oil'- set both horizontally and vertically from the intake and is relatively nearlto the abruptly 'ofi'setting side of the body, at or near the inner end of the involute curve defined by'the water. 7

The lines of How are indicated roughly by I have found it advantageous to make the tubular discharge nozzle converge toward its outlet and to make the outlet of much smaller cross section thanthe inlet. The-reduction of the size of the outlet-greatly improves the quality of the spray, breakin the water up .into very much finer partic es. The convergence may be of various contours to secure part of the benefit of-my invention. It is desirably conical as illustrated in Figures 2 and 3 but much more desirably inwardly concaved, of which one hell form is shown in Figure 4. Obviously, too, the degree'o'f convergence may plant conditions, as diiferent available heads,

be modified to suit different illustrated in Figures 2 and 3 which are the same except for difierence in convergence of the dischar e nozzle. 1

The disc arge edge 14 of the nozzle 9is from injury by the raised flange 15. be noted that the inner end of the protected It will involute and therefore the outlet into the dischar e nozzle is located in that region of low uid ener an abrupt ofi'set region, except for usually a dead space, and transition into 1t from the mainstream is accompanied by a sudden-drop in kinetic energy without corresponding gain in static energy, a condiwhirljof eddy currents wlth corresponding loss in the available energy of the main stream. V

In locating the outlet'into the discharge rom lines of flow. Such a nozzle in this region-of lowfluid energy and which always exists after harmful eddy currents, is

in guiding the main stream to rotary motion about it, I utilize the energy of this whirl and am thus enabled to secure the high efiipiency which my nozzle develops in prac- In View of my invention and disclosure, variations and modifications will doubtless occur to others skilled in the art to meet individual whim or particular need and I claim all such in so far as they fall Within. the reasonable spirit aind scope of my invention.

Having thus described my invention, what ll claim as new and desire to secure by Letters Patent is 1. In a spray head, an intake, a body at one end thereof having an interior involute peripheral Wall tangentially merging With onewall of the inlet and sharply offsetting at the opposite inlet wall, and a laterallydirected converging outlet passage having a minimum section of .much smaller section". than the intake, leadingofi from a point at the interior of the involute and-having its axis offset from the inlet.

2. In a spray head, an inlet, a bod at one end thereof having an interior invo ute peripheral wall tangentially merging with one wall of the'inlet and sharply offsetting at the opposite inlet wall, and an outlet laterally directed converging bell passage of much smaller minimum section than the intake leading ofl from a point at the interior of the involute and having its axis ofi'set from the inlet. a

3. In a spray head, an inlet, a body at one end of the inlet having an interior lnvolute peripheral wall tangentially merging with one wall of the inlet and sharply offsetting at the opposite inlet wall, a laterally directed, converging outlet passage of much smaller minimum section than the intake leading off from a point at the interior of the involute and'having its axis offset from the inlet, and a raised guard around the discharge rim of the passage.

4. lln a spray head, an inlet initially circular and flattened adjacent the body, a body at one end of the inlet having an interior involute peripheral wall tangentially mergin with onewall of the inlet and sharply 0 setting at the opposite inlet wall and a laterally directed converging outlet passage leading off from the interior of the involute, of much smaller minimumsection than the inlet and having its axis offset from the inlet.

5. The method of spraying water received from a cylindrical supply pipe which consists in flattening the stream of water, and subsequently giving the Water circumferentially converging spiral movement and a higher velocity and finally a converging rotary movement lateral to the spiral movement.

WILLIAM H. KLEriv. 

